Volume 32 Issue 2
Jan 2018
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GAO Hao'an, MA Shuailing, BAO Kuo, ZHU Pinwen, CUI Tian. Synthesis of Hard Superconductive Ternary Transition Metal Carbide under High Pressure and High Temperature[J]. Chinese Journal of High Pressure Physics, 2018, 32(2): 023301. doi: 10.11858/gywlxb.20170633
Citation: GAO Hao'an, MA Shuailing, BAO Kuo, ZHU Pinwen, CUI Tian. Synthesis of Hard Superconductive Ternary Transition Metal Carbide under High Pressure and High Temperature[J]. Chinese Journal of High Pressure Physics, 2018, 32(2): 023301. doi: 10.11858/gywlxb.20170633

Synthesis of Hard Superconductive Ternary Transition Metal Carbide under High Pressure and High Temperature

doi: 10.11858/gywlxb.20170633
  • Received Date: 21 Aug 2017
  • Rev Recd Date: 03 Sep 2017
  • In the present work MoWC2 was successfully fabricated under 5.0GPa/2000K with a holding time of 60min using, as the synthetic raw material, molybdenum, tungsten and graphite powder (whose purity are more than 99.8%).Then the physical properties of the synthesized samples were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, micro-hardness test, physical property measurement system and thermo gravimetric-differential thermal analyzer (TG-DTA).The results show that the MoWC2 crystal thus synthesized has a hexagonal structure with a space group of P6-m2.It is highly crystalline with an average grain size of 1-4μm.Its convergence hardness value, oxidation temperature and the superconducting temperature are 15.3GPa, 450℃ and 6.8K, respectively.In addition, this MoWC2 has a high hardness and oxidation resistance owing to its strong orbital hybridization.Furthermore, it is a superconducting material with a relatively high transition temperature since it has a higher density of states at the Fermi surface and Debye temperature, thereby making it a versatile material that is superconductive, highly heat-resistant, and superhard.

     

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